wrenchhead >> Grouping car by "generation" was one of the thing that I'd like to add. But it requires a manual operation: we have to at least define the model names for each group. And it won't be very easy to make something automated with long model names that we often have (e.g. there is often more than just the basic model name used as model on the site).

DIEHARD >> For sure such info would be useful for the page that displays all vehicles of a make. Maybe we could also add it for some models, but then it will increase very much the number of page/links that have to be made. If we have already an info page for each make we could get most of the useful info I think.